<html><head><style id="ai-assist-right-style">
    html.ai-assist-html {
      width: calc(100% - 480px)!important;
      position: relative!important;
      min-height: 100vh!important
    }
    .ai-assist-highlight {
      background: yellow;
    }
  </style></head><body><p style="background:red;width:200px;height:50px;">自定义标签</p></body><div id="ai-assist-root"></div></html>